/*
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.skatiger.jrove.component.core;

import java.io.IOException;

import javax.el.ELException;

import org.skatiger.jrove.JroveContext;
import org.skatiger.jrove.JroveException;
import org.skatiger.jrove.TagConfig;
import org.skatiger.jrove.TagHandler;
import org.skatiger.jrove.component.UIComponent;
import org.skatiger.jrove.tag.TagAttribute;
import org.skatiger.jrove.tag.TagException;

public final class FacetHandler extends TagHandler {

    public static final String KEY = "~jrove.component.facet~";

    protected final TagAttribute name;

    public FacetHandler(TagConfig config) {
        super(config);
        this.name = this.getRequiredAttribute("name");
    }

    public void apply(JroveContext ctx, UIComponent parent) throws IOException, JroveException, ELException {
        if (parent == null) {
            throw new TagException(this.tag, "Parent UIComponent was null");
        }
        parent.getAttributes().put(KEY, this.name.getValue(ctx));
        try {
            this.nextHandler.apply(ctx, parent);
        } finally {
            parent.getAttributes().remove(KEY);
        }
    }
}
